Preparation method of vanadium trioxide or doped vanadium trioxide nano powder
A vanadium trioxide nanometer and vanadium trioxide technology are applied in the field of nano-powder preparation, which can solve the problems of inability to obtain vanadium trioxide nano-powder and vanadium trioxide nano-powder, and achieve large-scale and rapid preparation. , The preparation method is scientific, and the size is controllable.
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Embodiment 1
[0020] The concrete steps of preparation are:
[0021] Step 1, put vanadium pentoxide powder or vanadium pentoxide mixed powder doped with oxides in a powder feeder and keep it in a stirring state; wherein, the vanadium pentoxide mixed powder doped with oxides The weight ratio of vanadium pentoxide and doping oxide in the body is 100:0.5, and the doping oxide is aluminum oxide.
[0022] Step 2, send the vanadium pentoxide powder in the powder feeder or the vanadium pentoxide mixed powder doped with oxides into the plasma arc under the reducing reaction atmosphere at a rate of 10g / min by nitrogen gas. The temperature is 2000 The reduction reaction is carried out in the plasma chamber at ℃; wherein, before the plasma arc is ignited, the plasma chamber is pre-deoxygenated with hydrogen gas, the arc-starting hydrogen flow rate is 5L / min when the plasma arc is ignited, and the reduction reaction atmosphere has a volume ratio of 1:10 mixed gas of hydrogen and water vapor, the flow ...
Embodiment 2
[0025] The concrete steps of preparation are:
[0026] Step 1, put vanadium pentoxide powder or vanadium pentoxide mixed powder doped with oxides in a powder feeder and keep it in a stirring state; wherein, the vanadium pentoxide mixed powder doped with oxides The weight ratio of vanadium pentoxide to doping oxide in the body is 100:1.2, and the doping oxide is aluminum oxide.
[0027] Step 2, the vanadium pentoxide powder in the powder feeder or the vanadium pentoxide mixed powder doped with oxides is sent into the plasma arc under the reducing reaction atmosphere at a rate of 35g / min by nitrogen gas. The temperature is 2150 The reduction reaction is carried out in the plasma chamber of ℃; wherein, before the plasma arc is ignited, the plasma chamber is pre-deoxygenated with hydrogen gas, the flow rate of the arc-starting hydrogen gas when the plasma arc is ignited is 12L / min, and the reduction reaction atmosphere has a volume ratio of 1:13 mixed gas of hydrogen and water va...
Embodiment 3
[0030] The concrete steps of preparation are:
[0031] Step 1, put vanadium pentoxide powder or vanadium pentoxide mixed powder doped with oxides in a powder feeder and keep it in a stirring state; wherein, the vanadium pentoxide mixed powder doped with oxides The weight ratio of vanadium pentoxide and doping oxide in the body is 100:1.8, and the doping oxide is aluminum oxide.
[0032] Step 2, the vanadium pentoxide powder in the powder feeder or the vanadium pentoxide mixed powder doped with oxides is sent into the plasma arc under the reducing reaction atmosphere at a rate of 65g / min by nitrogen gas. The temperature is 2300 The reduction reaction is carried out in the plasma chamber at ℃; wherein, before the plasma arc is ignited, the plasma chamber is pre-deoxygenated with hydrogen gas, the flow rate of the arc-starting hydrogen gas when the plasma arc is ignited is 18L / min, and the reduction reaction atmosphere has a volume ratio of 1:15 mixed gas of hydrogen and water v...
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